Detector



FIG. 1 is a front elevation view of a detector;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan the view thereof;

FIG. 6 is a bottom plan the view thereof; and,

FIG. 7 is a front, right side perspective view thereof. 

CLAIM The ornamental design for a detector, as shown and described. 